966 Words4 Pages

Gianna Munoz & Nicky Quintana
7th Period
#8
9-27-15
Density of Metals - Shot Lab
Purpose: The purpose of this lab is to determine the density of two unknown metals.
Materials:
• Metal Shot
• Wash Bottle
• Electric balances
• Calculator
• Graduated cylinders
• Water
• Sieve
• Weigh boats
Pre-lab Questions:
1. What is the volume of the water in the graduated cylinder shown?
The volume of the water in the graduated cylinder is 43.1 milliliters.
2. What is the volume of the metal shot and the water shown in the graduated cylinder?
The volume of the metal shot and the water in the graduated cylinder is 73.1 milliliters.
3. What is the volume of the metal that was added to the graduated cylinder?
Since 73.1 mL minus 43.1 mL equals 30.0 mL,*…show more content…*

Then divide that answer by the accepted value (8.93 g/cm ^3). Finally, multiply the answer (.086) by one hundred and add the percentage symbol to express the answer as a percentage. The final answer was 86%. 2. What mass of copper shot would have volume of 25.15 cm^3? M = D * V M = 0.86 cm^3 * 25.15 cm^3 M = 21.63 cm^3 Mass is calculated by the density (D) multiplied by the volume (V). Once this is gets set up substitute the variables for the given values. Substitute the D for 0.86 cm^3 and the V for 25.15 cm^3. Multiply the values and the final answer should be 21.63 cm^3. 3.What volume would 75.0 g of copper shot occupy? V = M/D V = 75.0 g / 0.86 cm^3 V = 87.2 g/ cm^3 To find the volume divide the mass (M) by the density (D). Once this is gets set up substitute the variables for the given values. Substitute the M for 75.0 g and the D for 0.86 cm^3. Divide the values and the final answer should be 87.2 g/cm^3. 4. If 50.0 cm^3 of one type of metal has a mass of 352 g, is this metal copper?*…show more content…*

The group was able to able to meet the objective. The procedure consisted of many steps. It began with gathering materials, creating data tables, filling cylinders with the appropriate amount of water, dropping metals of various densities into the water and finally recording the results. The results found through the experiment are as follows. As the mass increased so did the volume of the metal. As the metals and volumes increased in the data so did the density. These results show a linear relationship. During the experiment there were a few things that appeared odd. For instance, the line on the graph for Unknown Metal E appeared to look astonishingly different than Unknown B. An issue that also came up was the difficulty using Microsoft Excel to create the graph. The key concepts in this lab were as follows. Finding the relationship between the mass and volume, and how that affected density. During the experiment the results showed that as the mass increased so did the volume. Thus, increasing the density in each kind of metal. The data shows that a linear relationship is present in this

Then divide that answer by the accepted value (8.93 g/cm ^3). Finally, multiply the answer (.086) by one hundred and add the percentage symbol to express the answer as a percentage. The final answer was 86%. 2. What mass of copper shot would have volume of 25.15 cm^3? M = D * V M = 0.86 cm^3 * 25.15 cm^3 M = 21.63 cm^3 Mass is calculated by the density (D) multiplied by the volume (V). Once this is gets set up substitute the variables for the given values. Substitute the D for 0.86 cm^3 and the V for 25.15 cm^3. Multiply the values and the final answer should be 21.63 cm^3. 3.What volume would 75.0 g of copper shot occupy? V = M/D V = 75.0 g / 0.86 cm^3 V = 87.2 g/ cm^3 To find the volume divide the mass (M) by the density (D). Once this is gets set up substitute the variables for the given values. Substitute the M for 75.0 g and the D for 0.86 cm^3. Divide the values and the final answer should be 87.2 g/cm^3. 4. If 50.0 cm^3 of one type of metal has a mass of 352 g, is this metal copper?

The group was able to able to meet the objective. The procedure consisted of many steps. It began with gathering materials, creating data tables, filling cylinders with the appropriate amount of water, dropping metals of various densities into the water and finally recording the results. The results found through the experiment are as follows. As the mass increased so did the volume of the metal. As the metals and volumes increased in the data so did the density. These results show a linear relationship. During the experiment there were a few things that appeared odd. For instance, the line on the graph for Unknown Metal E appeared to look astonishingly different than Unknown B. An issue that also came up was the difficulty using Microsoft Excel to create the graph. The key concepts in this lab were as follows. Finding the relationship between the mass and volume, and how that affected density. During the experiment the results showed that as the mass increased so did the volume. Thus, increasing the density in each kind of metal. The data shows that a linear relationship is present in this

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